*{
    user-select: none;
    /* 无法选中，整体感更强 */
}

body{
    /*background-image: url(./wall.png);*/
    background-size: cover;
    background-attachment: fixed;
}


.container {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    text-align: center;
    flex-direction: column;
  }


  h1 {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 4rem;
    color: #2c3e50;
    margin-bottom: 2rem;
    text-align: center;
  }
  


  .btn-group {
    display: flex; 
    justify-content: center;
    justify-content: center;
    align-items: center;
  }
  
  button {
    font-family: Arial, Helvetica, sans-serif;
    font-size: 2rem;
    color: #ffffff;
    background-color: #2c3e50;
    border: none;
    padding: 1rem 2rem;
    margin: 0 1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s ease;
  }
  
  button:hover {
    background-color: #34495e;
  }